That's the heaviest online spending in any single day ever, ComScore said. Consumers just about evenly split their buying between home and the office.

But some perspective here. Consumers are by no means waiting until Cyber Monday to cyber shop.

ComScore reported ecommerce spending so far this holiday season of $16.4 billion. And that's 16 percent more than last year.

"It is...clear that the holiday promotional period has begun even earlier this year, with strong online sales occurring on Thanksgiving Day and Black Friday," said Gian Fulgoni, ComScore chairman. "Now, we shall see the extent to which continuing and attractive retailer promotions are able to boost sales for the remainder of the week.”

Nearly a year after being acquired by rival Men's Wearhouse in a contentious takeover struggle, Jos. A. Bank Clothiers will lay off 122 employees at the company's corporate headquarters in Hampstead, a company spokesman said Monday.